COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

Which is false statement about air receivers?

These knock out some oil and moisture

These act as reservoir to take care of sudden demands

These increase compressor efficiency

These are used to dampen pulsations

TRUE ANSWER : ?
YOUR ANSWER : ?

The material commonly used for air craft gas turbine is

Stainless steel

Timken, Haste alloys

High alloy steel

Duralumin

TRUE ANSWER : ?
YOUR ANSWER : ?

Axial flow compressor resembles

Reciprocating pump

Centrifugal pump

Sliding vane compressor

Turbine

TRUE ANSWER : ?
YOUR ANSWER : ?

The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.

One sixth

Same

One fourth

One-half

TRUE ANSWER : ?
YOUR ANSWER : ?

High air-fuel ratio in gas turbines

Do not damage turbine blades

Improves thermal efficiency

Reduces exhaust temperature

Increases power output

TRUE ANSWER : ?
YOUR ANSWER : ?

It is not possible to use closed gas turbine cycle in aeronautical engines because

It is inefficient

None of these

It requires cooling water for its operation

It is bulky

TRUE ANSWER : ?
YOUR ANSWER : ?

The type of rotary compressor used in aeroplanes, is of

Axial flow type

Centrifugal type

None of these

Radial flow type

TRUE ANSWER : ?
YOUR ANSWER : ?

The net work input required for compressor with increase in clearance volume

Increases

Decreases

Remains same

Increases/decreases depending on compressor capacity

TRUE ANSWER : ?
YOUR ANSWER : ?

The degree of reaction is usually kept ________ for all types of axial flow compressors.

0.4

0.5

0.3

0.2

TRUE ANSWER : ?
YOUR ANSWER : ?

Gas turbines use following type of air compressor

Reciprocating type

Lobe type

Centrifugal type

Axial flow type

TRUE ANSWER : ?
YOUR ANSWER : ?

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